@vbuendiar wrote: "The US does a terrible policy and then suddenly everybody is considering what can we do to help them."
I doubt the EU is trying to help the US. I think they've realized they'll be able to hire top scientists for cheap.
For example:
"I start in Ireland at the beginning of June. Overall, I will be earning slightly less than here in the U.S. But the cost of living, aside from housing, is lower in Ireland. The salary reduction is worth it to me. I want to be able to engage in climate research without worrying each day whether or not my position is going to be terminated."
China will probably work harder to get US scientists, but many from the US will find the EU more comfortable, so the EU can pay less.